DETERMINATION OF MESH BREAKING STRENGTH OF POLYAMIDE FISHING NETS UNDER THE EXPOSURE OF BENZINE, DETERGENT, SALT AND LIGHT
This study deals with the determination of breaking strength of polyamide cage fishing nets under the exposure of salt, light and varying environmental pollutants such as benzine and detergent. A series of experiments under varying conditions was carried out in order to determine breaking strength that is of a great importance in ensuring correct performance of a particular gear. Breaking strength values of the 39/14 fishing net samples which were held in benzine, detergent and dry salt at room temperature for 1 to 5 months are found to decrease with time. Loss of breaking strength values with detergent, benzine and dry salt resulted respectively as 10.09%>6.475%>3.39%. According to results, it can be generalized that detergent is the most abrasive pollutant. In laboratories conducting tests on fishing nets using detergent, benzine and salt the duration of the test should be lasted at least 5 months. No remarkable change with a slight loss of strength value of 0.36% observed in 36/18 fishing net samples which were exposed artificial sun light for 300 hours (Equals 2700 hours of sunlight exposure). It can be concluded that this result proved the fact of PA nets are very durable against sun light. The results of this study point out that the test conditions in laboratories duration and chemicals have a great impact on the results of tests. Pollutants such as detergent and benzine can noticeably decrease the strength of fishing nets and affect the productivity and Effectiveness of Fishing Operations.
Anahtar Kelimeler:
Fishing Net, Polyamide, Mesh Breaking Strength, Pollution, Detergent
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- • Andrady, A.L., (1990). Environmental Degradation of Plastics Under Land and Marine Exposure Conditions. Proceedings of Second International Conference on Marine Debris, 2-7 April 1989, Honolulu, Hawaii, U.S. Dep. Commer. NOAA Tech. Memo. NOAA-TM-NMFS-SWFSC-154.1990
- • Boxhammer, J., (1999a). Current Status of Light and Weather Fastness Standards. New Equipment Technologies, Operating Procedures and Application of Standard Reference Materials, Published by Elsevier Inc.
- • Boxhammer, J., (1999b). Surface Temperatures and Temperature Measurement Techniques on the Level of Exposed Samples During Irradiation/Weathering in Equipment Weathering of Plastics Testing to Mirror Real Life Performance, Pages 105-119.
- • Boxhammer, J. and Scott, K.P., (1999). A Comparison of New and Established Accelerated Weathering Devices in Aging Studies of Polymeric Materials at Elevated Irradiance and Temperature ,Weathering of Plastics Testing to Mirror Real Life Performance, Pages 29-41.
- • British Columbia Ministry of Agriculture, Food and Fisheries, (2002). British Columbia Net Cage Mesh Strength Testing Procedure -Version I, March 2002. • Düzgüneş, O., Kesici, T., and Gürbüz, F., (1983). İstatistik Metodları (Statistical Methods) A.Ü. Ziraat Fakültesi Yayınları: 861, pp:185-186, Ankara.
- • FAO, (Food and Agriculture Organization). 2005. Available: www.fao.org/fi/stat/summary/a-0a.pdf (Cited 2010).
- • Klust, G., (1982). Netting Materials for Fishing Gear. UK: Fishing News Book Ltd.2nd ed.
- • Masters, L.W. and Bond, L.F., (1999). Choices in the Design of Outdoor Weathering Tests Weathering of Plastics Testing to Mirror Real Life Performance, Pages 15-27,
- • Ramos, J.M.L., (1999). Chemical and Physical Properties of Synthetic Fibres Most Commonly Used in Fishing Gear, With Reference to Their Use in Cape Verde Fisheries, UNU Fisheries Training Programme Final Projects.
- • Sainsbury, J.C., (1996). Commercial Fishing Methods. UK: Fishing News Book Ltd. 3rd ed.
- • Summers, J.W. and Rabinovitch, E.B., (1999). Weatherability of Vinyl and Other Plastics Weathering of Plastics Testing to Mirror Real Life Performance, Pages 61-68.
- • Turkish Standards Institution, (2001). TS 1008 EN ISO B02: 2001 Textiles- Tests for Colour Fastness- Part B02: Colour Fastness to Artificial Light: Xenon Arc Fading Test.
- • Turkish Standards Institution, (2004). TS 6246 EN ISO 1806:2004 Fishing nets- Determination of Mesh Breaking Force of Netting.
- • Turkish Standards Institution, (2006). TS EN ISO 139:2006 Textiles-Standard Atmospheres for Conditioning and Testing. • Wypych, G. and Faulkner, T., (1999). Basic Parameters in Weathering Studies, Weathering of Plastics, Testing to Mirror Real Life Performance, Pages 1-13.
- • Zar, J.H., (1999). Biostatistical Analysis, 4th ed., pp:662 Prentice Hall Inc., NJ.
- Başlangıç: 2009
- Yayıncı: E-Journal of New World Sciences Academy